[1] Univ Penn, Sch Med, Ctr Mental Hlth Policy & Serv Res, Dept Psychiat, Philadelphia, PA 19104 USA
[2] Univ Penn, Sch Med, Dept Pediat, Philadelphia, PA 19104 USA
[3] Ctr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA USA
[4] Med Univ S Carolina, Div Genet & Dev Pediat, Charleston, SC USA
[5] Ctr Hlth Serv Res, Chapel Hill, NC USA
[6] Univ Colorado, Dept Epidemiol, Colorado Sch Publ Hlth, Denver, CO 80202 USA
[7] Univ Wisconsin, Sch Med & Publ Hlth, Dept Populat Hlth Sci, Madison, WI 53706 USA
[8] Univ Wisconsin, Sch Med & Publ Hlth, Dept Pediat, Madison, WI 53706 USA
[9] Univ Penn, Sch Nursing, Philadelphia, PA 19104 USA
[10] Emory Univ, Sch Med, Emory Autism Ctr, Atlanta, GA USA
[11] Med Univ S Carolina, Dept Biostat Bioinfformat & Epidemiol, Charleston, SC USA
[12] Med Univ S Carolina, Dept Neurosci, Charleston, SC USA
[13] Washington Univ, George Warren Brown Sch Social Work, St Louis, MO 63130 USA
[14] Univ S Florida, Dept Community & Family Hlth, Tampa, FL USA